[#include "/common/mainTemplate.ftl"]
[@main title="条件判断 Demo"]
		<div style="border:1px solid #999999;margin:0 auto;height:100px;font-size:14px;font-weight:bold;">
			[#if param??]
				the parameter you submit is ${param!}
			[#else]
				you visit the no parameter uri
			[/#if]
		</div>
[/@main]